Chassis structure of four-wheeler

Abstract

The utility model belongs to the technical field of vehicles, in particular to a chassis structure of a four-wheeler, which comprises a frame, a front axle assembly and a rear axle assembly, a front connecting pipe is connected between a front cross beam of the front axle assembly and the frame, the length direction of the front connecting pipe is longitudinally arranged, the front end of the front connecting pipe is welded on the front cross beam, and the rear end of the front connecting pipe is rotatably connected with the frame. The two front connecting pipes are located at the left end and the right end of the front cross beam correspondingly. Two rear connecting pipes are connected between a rear cross beam of the rear axle assembly and the frame, the length direction of the rear connecting pipes is arranged in the longitudinal direction, the front ends of the rear connecting pipes are rotationally connected with the frame, the rear ends of the rear connecting pipes are connected to the rear cross beam, and the two rear connecting pipes are located at the left end and the right end of the rear cross beam respectively. The frame is close to the ground, namely the gravity center of the chassis is low, and the vehicle stability is good.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle technical field, especially point to a chassis structure of four -wheeled vehicle. BACKGROUND

[0002] Chinese invention patent (publication number CN114435103A, application day 2022.02.10, public day 2022.05.06) discloses a kind of electric light truck chassis, including frame, the front and rear sides of the frame are respectively provided with front axle assembly and rear axle assembly, front shock absorber is arranged between front axle assembly and frame, rear shock absorber is arranged between rear axle assembly and frame;The front side of frame is provided with the steering gear assembly of controlling front wheel steering;Two groups of power batteries are arranged in the middle of frame, and are respectively placed in the left and right sides of frame, transmission shaft assembly and motor assembly are arranged in the middle of frame, motor assembly drives rear axle assembly by transmission shaft assembly;Vacuum pump, vacuum tank, radiator, electronic water pump and multi-in-one controller are arranged in the front side of frame.The front shock absorber and rear shock absorber are all adopted as cylinder shock absorber structure.

[0003] The above chassis has the following disadvantages: the front axle assembly and the frame are connected by the cylinder shock absorber, and the rear axle assembly and the frame are connected by the cylinder shock absorber, the frame is far from the ground, i.e., the center of gravity of the chassis is high, and the vehicle stability is poor. SUMMARY

[0004] The utility model aims at providing a kind of chassis structure of four -wheeled vehicle, its frame is close to ground, i.e., the center of gravity of the chassis is low, and the vehicle stability is good.

[0005] The utility model is realized as follows:

[0006] A kind of chassis structure of four -wheeled vehicle, including frame, front axle assembly and rear axle assembly, front connecting pipe is connected between the front crossbeam of front axle assembly and frame, the length direction of front connecting pipe is set along longitudinal direction, the front end of front connecting pipe is welded on front crossbeam, and the rear end is rotationally connected with frame, the front connecting pipe is provided with two, and is located at the left and right ends of front crossbeam respectively;Rear connecting pipe is connected between the rear crossbeam of rear axle assembly and frame, the length direction of rear connecting pipe is set along longitudinal direction, the front end of rear connecting pipe is rotationally connected with frame, and the rear end is connected on rear crossbeam, the rear connecting pipe is provided with two, and is located at the left and right ends of rear crossbeam respectively.

[0007] In the above-mentioned chassis structure of four -wheeled vehicle, the front end of front connecting pipe is welded on the rear side of front crossbeam, connecting plate is connected between two front connecting pipes, the side of front connecting pipe away from connecting plate is provided with reinforcing rib plate, the reinforcing rib plate is right triangle, one of the right angle edges of reinforcing rib plate is welded on front crossbeam, and the other right angle edge is welded on corresponding front connecting pipe.

[0008] In the chassis structure of the four-wheeled vehicle, the left and right ends of the connecting plate are respectively welded on the corresponding front connecting pipes.

[0009] In the chassis structure of the four-wheeled vehicle, the front ends of the connecting plate and the reinforcing rib plate are respectively welded on the rear side of the front cross beam, and the connecting plate connects the concave groove formed in the end face of the front cross beam.

[0010] In the chassis structure of the four-wheeled vehicle, a plurality of grooves are arranged in the transverse direction.

[0011] In the chassis structure of the four-wheeled vehicle, the depth of the groove is 3-5 mm.

[0012] In the chassis structure of the four-wheeled vehicle, the connecting plate is provided with a clearance gap.

[0013] In the chassis structure of the four-wheeled vehicle, the bottom of the frame is provided with two U-shaped connecting seats, the opening of the U-shaped connecting seat is downward, and the two side plates of the U-shaped connecting seat are provided with connecting rods, and the connecting rods are sleeved with bearings.

[0014] In the chassis structure of the four-wheeled vehicle, the flat plate of the U-shaped connecting seat is welded on the bottom of the frame.

[0015] In the chassis structure of the four-wheeled vehicle, the left and right sides of the frame are respectively provided with U-shaped connecting seats, the opening of the U-shaped connecting seat is downward, and the two side plates of the U-shaped connecting seat are provided with connecting rods, and the connecting rods are sleeved with bearings.

[0016] In the chassis structure of the four-wheeled vehicle, the left and right sides of the frame are respectively provided with U-shaped connecting seats, the opening of the U-shaped connecting seat is upward, and the two side plates of the U-shaped connecting seat are welded on the frame, the U-shaped connecting seat is located below the U-shaped connecting seat, and the flat plate of the U-shaped connecting seat is welded on the flat plate of the U-shaped connecting seat.

[0017] In the chassis structure of the four-wheeled vehicle, the bottom of the rear cross beam is welded with two U-shaped connecting seats, the opening of the U-shaped connecting seat is downward, and the two side plates of the U-shaped connecting seat are provided with connecting rods and connecting rods, the connecting rod is located at the front end of the U-shaped connecting seat, the connecting rod is located at the rear end of the U-shaped connecting seat, the connecting rod is sleeved with bearings, the connecting rod is sleeved with bearings, the rear end of the rear connecting pipe is welded on the outer ring of the bearing, the outer ring of the bearing is matched with the semicircular groove on the rear connecting pipe, and the outer ring of the bearing is welded in the semicircular groove.

[0018] In the chassis structure of the four-wheeled vehicle, the semicircular groove one is arranged in the upper part of the rear connecting pipe.

[0019] In the chassis structure of the four-wheeled vehicle, the semicircular groove two is arranged in the semicircular groove two of the H-shaped connecting seat four, and the rear cross beam is welded in the semicircular groove two.

[0020] In the chassis structure of the four-wheeled vehicle, the connecting rod one, the connecting rod two, the connecting rod three and the connecting rod four can be the rod part of a bolt, and the bolt is fixed on the corresponding H-shaped connecting seat through a nut.

[0021] In the chassis structure of the four-wheeled vehicle, the gasket is arranged on the connecting rod between the two side plates of each H-shaped connecting seat and the corresponding bearing.

[0022] In the chassis structure of the four-wheeled vehicle, the connecting rod one, the connecting rod two, the connecting rod three 16 and the connecting rod four 17 can also be the rod part of a screw, and the screw is screwed with the corresponding H-shaped connecting seat.

[0023] In the chassis structure of the four-wheeled vehicle, the front connecting pipe is upwardly inclined from front to back, and the included angle between the front connecting pipe and the horizontal plane is 1°-5°; the rear connecting pipe is upwardly inclined from back to front, and the included angle between the rear connecting pipe and the horizontal plane is 8°-12°.

[0024] In the chassis structure of the four-wheeled vehicle, the front connecting pipe and the rear connecting pipe are square pipes, and the material is metal.

[0025] In the chassis structure of the four-wheeled vehicle, the front connecting pipe and the rear connecting pipe can also be round pipes or polygonal pipes.

[0026] In the chassis structure of the four-wheeled vehicle, the metal is aluminum, steel or iron.

[0027] In the chassis structure of the four-wheeled vehicle, the frame comprises two longitudinally arranged longitudinal rods and a plurality of transverse rods connecting the two longitudinal rods, the rear end of the front connecting pipe is rotationally connected with the longitudinal rod, and the front end of the rear connecting pipe is rotationally connected with the longitudinal rod.

[0028] In the chassis structure of the four-wheeled vehicle, the distance between the rear end connecting part of the front connecting pipe and the front cross beam is 1 / 3 of the distance between the front cross beam and the rear cross beam, and the distance between the front end connecting part of the rear connecting pipe and the rear cross beam is 1 / 3 of the distance between the front cross beam and the rear cross beam.

[0029] Compared with the prior art, the chassis structure of the four-wheeled vehicle has the following advantages:

[0030] The front cross beam is connected to the frame through the front connecting pipe, the rear cross beam is connected to the frame through the rear connecting pipe, the length direction of the front connecting pipe is arranged along the longitudinal direction, the length direction of the rear connecting pipe is arranged along the longitudinal direction, the frame is close to the ground, the chassis has low gravity center, and the vehicle has good stability; meanwhile, the rear end of the front connecting pipe is rotationally connected to the frame, the front end of the rear connecting pipe is rotationally connected to the frame, the front connecting pipe and the rear connecting pipe are not welded to the frame, so that the front connecting pipe and the rear connecting pipe can rotate relative to the frame when the utility model meets the bumpy road section, namely, the front axle assembly and the rear axle assembly can have certain displacement space in the vertical direction relative to the frame, a certain buffering effect is achieved, and certain movement space is provided, so that the tire cannot be raised too high during the driving process, and the driving is relatively stable. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the right view of the utility model;

[0032] Figure 2 is the three-dimensional view of the utility model Figure 1 ;

[0033] Figure 3 is the three-dimensional view of the utility model Figure 2 ;

[0034] Figure 4 is the explosion view of the rear end mounting structure of the rear connecting pipe.

[0035] Significant: 1, front cross beam;2, front connecting pipe;3, rear cross beam;4, rear connecting pipe;5, connecting plate;6, reinforcing rib plate;7, groove;8, several character shape connecting seat one;9, connecting rod one;10, bearing one;11, several character shape connecting seat two;12, connecting rod two;13, bearing two;14, several character shape connecting seat three;15, several character shape connecting seat four;16, connecting rod three;17, connecting rod four;18, bearing three;19, bearing four;20, semicircular groove one;21, vertical rod;22, horizontal rod;23, avoiding gap;24, semicircular groove two;25, gasket. DETAILED DESCRIPTION

[0036] The utility model will be further described in the specific embodiment, and reference is made to Figure 1 -4:

[0037] A chassis structure for a four-wheeled vehicle includes a frame, a front axle assembly, and a rear axle assembly. A front connecting pipe 2 connects the front crossbeam 1 of the front axle assembly to the frame. The length of the front connecting pipe 2 is longitudinally oriented, with its front end welded to the front crossbeam 1 and its rear end rotatably connected to the frame. Two front connecting pipes 2 are provided, located at the left and right ends of the front crossbeam 1, respectively. A rear connecting pipe 4 connects the rear crossbeam 3 of the rear axle assembly to the frame. The length of the rear connecting pipe 4 is longitudinally oriented, with its front end rotatably connected to the frame and its rear end connected to the rear crossbeam 3. Two rear connecting pipes 4 are provided, located at the left and right ends of the rear crossbeam 3, respectively.

[0038] In this embodiment, the left-right direction is horizontal, the front-back direction is vertical, and the up-down direction is vertical.

[0039] like Figures 1-4 As shown, the front crossbeam 1 of this utility model is connected to the frame via the front connecting pipe 2, and the rear crossbeam 3 is connected to the frame via the rear connecting pipe 4. The length direction of the front connecting pipe 2 is longitudinal, and the length direction of the rear connecting pipe 4 is also longitudinal. The frame is close to the ground, that is, the chassis center of gravity is low, and the vehicle has good stability. At the same time, the rear end of the front connecting pipe 2 is rotatably connected to the frame, and the front end of the rear connecting pipe 4 is rotatably connected to the frame. The front connecting pipe 2 and the rear connecting pipe 4 are not welded to the frame, so that when encountering bumpy road sections, the front connecting pipe 2 and the rear connecting pipe 4 can rotate relative to the frame. That is, the front axle assembly and the rear axle assembly can have a certain vertical displacement space relative to the frame, which plays a certain buffering role and has a certain amount of room for movement, so that the tires will not lift too high during driving, and the driving is relatively stable.

[0040] Connection structure between front connecting pipe 2 and front crossbeam 1: as follows Figure 2 , 3 As shown, the front end of the front connecting pipe 2 is welded to the rear side of the front crossbeam 1. A connecting plate 5 connects the two front connecting pipes 2. A reinforcing rib 6 is provided on the side of the front connecting pipe 2 away from the connecting plate 5. The reinforcing rib 6 is a right-angled triangle. One right-angled side of the reinforcing rib 6 is welded to the front crossbeam 1, and the other right-angled side is welded to the corresponding front connecting pipe 2. The connection is firm and reliable, and the structure is simple.

[0041] Furthermore, the left and right ends of the connecting plate 5 are respectively welded to the corresponding front connecting pipe 2.

[0042] Furthermore, the front ends of the connecting plate 5 and the reinforcing rib plate 6 are respectively welded to the rear side of the front crossbeam 1. The end face of the connecting plate 5 connected to the front crossbeam 1 is recessed to form a groove 7, which reduces the welding area and avoids poor welding strength due to uneven end face of the connecting plate 5.

[0043] Preferably, multiple grooves 7 are provided at lateral intervals. In this embodiment, two grooves 7 are provided at lateral intervals.

[0044] Furthermore, the depth of the groove 7 is 3mm-5mm. In this embodiment, the depth of the groove 7 is 4mm.

[0045] Furthermore, the connecting plate 5 is provided with an avoidance notch 23.

[0046] Connection structure between front connecting tube 2 and the frame: as follows Figures 1-3 As shown, the bottom of the frame is provided with two U-shaped connecting seats 8, with the openings of the U-shaped connecting seats 8 facing downwards. Connecting rods 9 are provided on the side plates of the U-shaped connecting seats 8, and bearings 10 are fitted on the connecting rods 9. The rear end of the front connecting tube 2 is welded to the outer ring of the corresponding bearing 10. The structure is simple and easy to install and process.

[0047] Furthermore, the flat plate of the zigzag connector 8 is welded to the bottom of the frame.

[0048] The connection structure between the rear connecting tube 4 and the frame: as follows Figures 1-3 As shown, the frame has U-shaped connecting seats 11 on both the left and right sides, with the openings of the U-shaped connecting seats 11 facing downwards. Connecting rods 12 are provided on the side plates of the U-shaped connecting seats 11, and bearings 13 are fitted on the connecting rods 12. The front end of the rear connecting tube 4 is welded to the outer ring of the corresponding bearing 13. The structure is simple and easy to install and process.

[0049] The installation structure of the Z-shaped connector 2 11: The left and right sides of the frame are respectively provided with Z-shaped connector 3 14, the opening of the Z-shaped connector 3 14 faces upward, the two side plates of the Z-shaped connector 3 14 are welded to the frame, the Z-shaped connector 2 11 is located below the Z-shaped connector 3 14, and the flat plate of the Z-shaped connector 2 11 is welded to the flat plate of the Z-shaped connector 3 14.

[0050] The connection structure between the rear connecting pipe 4 and the rear crossbeam 3 is as follows: Figures 2-4 As shown, the bottom of the rear crossbeam 3 is welded with two U-shaped connecting seats 15, the openings of which face downwards. Connecting rods 16 and 17 are provided on the side plates of the U-shaped connecting seats 15. Connecting rod 16 is located at the front end of the U-shaped connecting seat 15, and connecting rod 17 is located at the rear end. A bearing 18 is fitted onto connecting rod 16, and a bearing 19 is fitted onto connecting rod 17. The rear end of the rear connecting pipe 4 is welded to the outer ring of bearing 19. The rear connecting pipe 4 has a semi-circular groove 20 that matches the outer ring of bearing 18, and the outer ring of bearing 18 is welded into the semi-circular groove 20. The connection is firm and reliable, and the structure is simple, facilitating processing and installation.

[0051] Further, the semicircular groove one 20 is arranged in the upper part of the rear connecting pipe 4.

[0052] Further, the semicircular groove two 24 is arranged on the U-shaped connecting seat four 15, and the rear cross beam 3 is welded in the semicircular groove two 24.

[0053] Further, the connecting rod one 9, the connecting rod two 12, the connecting rod three 16 and the connecting rod four 17 can be the rod part of the bolt, and the bolt is fixed on the corresponding U-shaped connecting seat through the nut.

[0054] Preferably, the gasket 25 is arranged on the connecting rod between the two side plates of each U-shaped connecting seat and the corresponding bearing.

[0055] Preferably, the front connecting pipe 2 is inclined upward from front to back, and the included angle between the front connecting pipe 2 and the horizontal plane is 1°-5°; the rear connecting pipe 4 is inclined upward from back to front, and the included angle between the rear connecting pipe 4 and the horizontal plane is 8°-12°. In the embodiment, the included angle between the front connecting pipe 2 and the horizontal plane is 2°, and the included angle between the rear connecting pipe 4 and the horizontal plane is 10°.

[0056] Preferably, the front connecting pipe 2 and the rear connecting pipe 4 are square pipes, and the material is metal, which has good strength.

[0057] Preferably, the metal is aluminum, steel or iron. In the embodiment, the front connecting pipe 2 and the rear connecting pipe 4 are steel square pipes.

[0058] The structure of the frame is shown in the figure. Figures 1-3 The frame comprises two parallel longitudinal rods 21 and a plurality of cross rods 22 connecting the two longitudinal rods 21, the rear end of the front connecting pipe 2 is rotationally connected with the longitudinal rod 21, and the front end of the rear connecting pipe 4 is rotationally connected with the longitudinal rod 21.

[0059] Preferably, the distance between the rear end connecting part of the front connecting pipe 2 and the front cross beam 1 is 1 / 3 of the distance between the front cross beam 1 and the rear cross beam 3, and the distance between the front end connecting part of the rear connecting pipe 4 and the rear cross beam 3 is 1 / 3 of the distance between the front cross beam 1 and the rear cross beam 3.

[0060] The above embodiment is only one of the preferred embodiments of the present application, and does not limit the implementation range of the present application, so that: all equivalent changes made according to the shape, structure and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A chassis structure for a four-wheeled vehicle, comprising a frame, a front axle assembly, and a rear axle assembly, characterized in that: The front crossbeam (1) of the front axle assembly is connected to the frame by a front connecting pipe (2). The length direction of the front connecting pipe (2) is longitudinal. The front end of the front connecting pipe (2) is welded to the front crossbeam (1) and the rear end is rotatably connected to the frame. There are two front connecting pipes (2), which are located at the left and right ends of the front crossbeam (1), respectively. The rear crossbeam (3) of the rear axle assembly is connected to the frame by a rear connecting pipe (4). The length direction of the rear connecting pipe (4) is longitudinal. The front end of the rear connecting pipe (4) is rotatably connected to the frame and the rear end is connected to the rear crossbeam (3). There are two rear connecting pipes (4), which are located at the left and right ends of the rear crossbeam (3), respectively.

2. The chassis structure of a four-wheeled vehicle according to claim 1, characterized in that: The front end of the front connecting pipe (2) is welded to the rear side of the front crossbeam (1). A connecting plate (5) is connected between the two front connecting pipes (2). A reinforcing rib (6) is provided on the side of the front connecting pipe (2) away from the connecting plate (5). The reinforcing rib (6) is a right triangle. One right-angled side of the reinforcing rib (6) is welded to the front crossbeam (1), and the other right-angled side is welded to the corresponding front connecting pipe (2).

3. The chassis structure of a four-wheeled vehicle according to claim 2, characterized in that: The front ends of the connecting plate (5) and the reinforcing rib plate (6) are respectively welded to the rear side of the front crossbeam (1), and the end face of the connecting plate (5) connected to the front crossbeam (1) is recessed to form a groove (7).

4. The chassis structure of a four-wheeled vehicle according to claim 1, characterized in that: The bottom of the frame is provided with two Z-shaped connecting seats (8), the openings of the Z-shaped connecting seats (8) face downwards, and the two side plates of the Z-shaped connecting seats (8) are provided with connecting rods (9), and bearings (10) are fitted on the connecting rods (9). The rear end of the front connecting tube (2) is welded to the outer ring of the corresponding bearing (10).

5. The chassis structure of a four-wheeled vehicle according to claim 1, characterized in that: The frame is provided with a zig-shaped connecting seat 2 (11) on the left and right sides respectively. The opening of the zig-shaped connecting seat 2 (11) faces downward. The two side plates of the zig-shaped connecting seat 2 (11) are provided with connecting rod 2 (12). The connecting rod 2 (12) is fitted with bearing 2 (13). The front end of the rear connecting tube (4) is welded to the outer ring of the corresponding bearing 2 (13).

6. The chassis structure of a four-wheeled vehicle according to claim 5, characterized in that: The frame is provided with a three-shaped connecting seat (14) on the left and right sides respectively. The opening of the three-shaped connecting seat (14) faces upward. The two side plates of the three-shaped connecting seat (14) are welded to the frame. The two-shaped connecting seat (11) is located below the three-shaped connecting seat (14), and the flat plate of the two-shaped connecting seat (11) is welded to the flat plate of the three-shaped connecting seat (14).

7. The chassis structure of a four-wheeled vehicle according to claim 1, characterized in that: The bottom of the rear crossbeam (3) is welded with two Z-shaped connecting seats four (15). The opening of the Z-shaped connecting seats four (15) faces downward. The two side plates of the Z-shaped connecting seats four (15) are provided with connecting rod three (16) and connecting rod four (17). The connecting rod three (16) is located at the front end of the Z-shaped connecting seat four (15), and the connecting rod four (17) is located at the rear end of the Z-shaped connecting seat four (15). The connecting rod three (16) is fitted with bearing three (18), and the connecting rod four (17) is fitted with bearing four (19). The rear end of the rear connecting tube (4) is welded to the outer ring of bearing four (19). The rear connecting tube (4) is provided with a semi-circular groove one (20) that matches the outer ring of bearing three (18). The outer ring of bearing three (18) is welded in the semi-circular groove one (20).

8. The chassis structure of a four-wheeled vehicle according to claim 1, characterized in that: The front connecting pipe (2) is inclined upward from front to back, and the angle between the front connecting pipe (2) and the horizontal plane is 1°-5°; the rear connecting pipe (4) is inclined upward from back to front, and the angle between the rear connecting pipe (4) and the horizontal plane is 8°-12°.

9. The chassis structure of a four-wheeled vehicle according to claim 1, characterized in that: The front connecting pipe (2) and the rear connecting pipe (4) are square tubes and are made of metal.

10. The chassis structure of a four-wheeled vehicle according to claim 1, characterized in that: The frame includes two parallel longitudinal bars (21) and multiple cross bars (22) connecting the two longitudinal bars (21). The rear end of the front connecting tube (2) is rotatably connected to the longitudinal bar (21), and the front end of the rear connecting tube (4) is rotatably connected to the longitudinal bar (21).

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